Solar Trough Organic Rankine Electricity System (STORES) Stage 1: Power Plant Optimization and Economics; November 2000 -- May 2005

Prabhu, E

doi:10.2172/881481

Cited by 34 publications

(23 citation statements)

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“…Within the STORES project in the U.S., a new paradigm for the successful deployment of thermal solar plants was investigated: economy of production can be achieved by means of high-volume manufacturing of small-capacity standard and modular systems, suitable for distributed energy conversion, instead of larger centralized power plants. ORC turbogenerators have been identified as the optimal conversion technology in this context, because of their performance and reliability [135,136]. The main outcome of the study has been the construction of the first solar plant of this kind in the Saguaro Desert, Tucson, AZ.…”

Section: Concentrated Solarmentioning

confidence: 99%

“…The criticality with such systems is related to the fully wet expansion process, still posing technological concerns regarding the expanding device. In case very high electrical efficiency is sought, the cascaded cycle configuration can be attractive and its evaluation has driven some interest, presenting several advantages if compared to a single cycle with large pressure ratio [10,43,136,147].…”

Section: Future Scenariosmentioning

confidence: 99%

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Organic Rankine Cycle Power Systems: From the Concept to Current Technology, Applications, and an Outlook to the Future

Colonna

Casati

Trapp

et al. 2015

Journal of Engineering for Gas Turbines and Power

312

190

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The cumulative global capacity of organic Rankine cycle (ORC) power systems for the conversion of renewable and waste thermal energy is undergoing a rapid growth and is estimated to be approx. 2000 MW e considering only installations that went into operation after 1995. The potential for the conversion of the thermal power coming from liquiddominated geothermal reservoirs, waste heat from primary engines or industrial processes, biomass combustion, and concentrated solar radiation into electricity is arguably enormous. ORC technology is possibly the most flexible in terms of capacity and temperature level and is currently often the only applicable technology for the conversion of external thermal energy sources. In addition, ORC power systems are suitable for the cogeneration of heating and/or cooling, another advantage in the framework of distributed power generation. Related research and development is therefore very lively. These considerations motivated the effort documented in this article, aimed at providing consistent information about the evolution, state, and future of this power conversion technology. First, basic theoretical elements on the thermodynamic cycle, working fluid, and design aspects are illustrated, together with an evaluation of the advantages and disadvantages in comparison to competing technologies. An overview of the long history of the development of ORC power systems follows, in order to place the more recent evolution into perspective. Then, a compendium of the many aspects of the state of the art is illustrated: the solutions currently adopted in commercial plants and the main-stream applications, including information about exemplary installations. A classification and terminology for ORC power plants are proposed. An outlook on the many research and development activities is provided, whereby information on new high-impact applications, such as automotive heat recovery is included. Possible directions of future developments are highlighted, ranging from efforts targeting volume-produced stationary and mobile mini-ORC systems with a power output of few kW e , up to large MW e base-load ORC plants.

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Section: Concentrated Solarmentioning

confidence: 99%

Section: Future Scenariosmentioning

confidence: 99%

Organic Rankine Cycle Power Systems: From the Concept to Current Technology, Applications, and an Outlook to the Future

Colonna

Casati

Trapp

et al. 2015

Journal of Engineering for Gas Turbines and Power

312

190

View full text Add to dashboard Cite

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“…In recent years, several studies have underlined the potential of small-capacity thermal solar organic power systems [19,18,20]. Different models of parabolic trough solar collector have therefore been added to the library.…”

Section: Solar Fieldmentioning

confidence: 99%

ThermoCycle: A Modelica library for the simulation of thermodynamic systems

Quoilin¹,

Desideri²,

Wronski³

et al. 2014

Linköping Electronic Conference Proceedings

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This paper presents the results of an on-going project to develop ThermoCycle, an open Modelica library for the simulation of low-capacity thermodynamic cycles and thermal systems. Special attention is paid to robustness and simulation speed since dynamic simulations are often limited by numerical constraints and failures, either during initialization or during integration. Furthermore, the use of complex equations of state (EOS) to compute thermodynamic properties significantly decreases the simulation speed. In this paper, the approach adopted in the library to overcome these challenges is presented and discussed.

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“…The stability thresholds (T^tab) of Table 3 are assessed on the basis of specific experimental investigation [14,18,[20][21][22][23][24][25][26], if available, or of technical papers about real applications [19,27]. For thermal stability of n-butane, n-hexane, cyclobutane, and D3, no reliable references are available in literattu-e.…”

Section: Thermodynamic Design Of the Heat Recovery Cycle And Working mentioning

confidence: 99%

“…According to Ref. [24], at 290 °C cyclohexane Table 3 Working fluids for high temperature ORC. For each fluid, the table shows the CAS number, the critical temperature, Tc, and pressure, Pc, the normal boiling temperature, TB, and the molecular weight, MW, the thermal stability threshold, T^tab, and the global warming potential, GWP.…”

Section: Thermodynamic Design Of the Heat Recovery Cycle And Working mentioning

confidence: 99%

Enhancement of the Electrical Efficiency of Commercial Fuel Cell Units by Means of an Organic Rankine Cycle: A Case Study

Servi¹,

Campanari

Tizzanini

et al. 2013

Journal of Engineering for Gas Turbines and Power

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Among the various fuel cell (FC) systems, molten carbonate fuel cells (MCFC) are nowadays one ofthe most promising technologies, thanks to the lower specißc costs and a very high electrical efficiency (net low heating value (LHV) electric efficiency in the range 45%-50% at MWei scale using natural gas as fuel). Despite this high performance, MCFC rejects to the ambient almost half of the fuel energy at about 350^00° C. Waste heat can be exploited in a recovery Rankine cycle unit, thereby enhancing the electric efflciency ofthe overall system. Due to the temperature ofthe heat source and the relatively small power capacity of MCFC plants (from few hundred kW^i to ¡OMW^i), steam Rankine cycle technology is uneconomical and less efficient compared to that of the organic Rankine cycle (ORC). The objective of this work is to verify the practical feasibility ofthe integration betn'een a MCFC system (topping unit) and an ORC turbogenerator (bottoming unit). The potential beneflts ofthe combined plant are assessed in relation to a commercial MCFC stack. In order to identify the most suitable working fluids for the ORC system, organic substances are considered and compared. The figure of merit is the maximum net power ofthe overall system. Finally, the economical beneflts of the integration are determined by evaluating the levelized cost of electricity (LCOE) of the combined plant, with respect to the standalone MCFC system. In order to assess the economic viability of the bottoming power unit, two cases are considered. In the flrst one, the ORC power output is approximately 500 kW^¡; in the latter, about I h/TW^i. Results show that the proposed solution can increase the electrical power output and efficiency of the plant by more than 10%, well exceeding 50% overall electrical efficiency. In addition, the LCOE of the combined power plant is 8% lower than the standalone MCFC system.

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Solar Trough Organic Rankine Electricity System (STORES) Stage 1: Power Plant Optimization and Economics; November 2000 -- May 2005

Abstract: iii

Cited by 34 publications

References 0 publications

Organic Rankine Cycle Power Systems: From the Concept to Current Technology, Applications, and an Outlook to the Future

Organic Rankine Cycle Power Systems: From the Concept to Current Technology, Applications, and an Outlook to the Future

ThermoCycle: A Modelica library for the simulation of thermodynamic systems

Enhancement of the Electrical Efficiency of Commercial Fuel Cell Units by Means of an Organic Rankine Cycle: A Case Study

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